<em># 转为字符串</em>
<i>String</i> v = list.<b>toString( )</b>;

<em># 转为集合</em>
<i>Set</i> v = list.<b>toSet( )</b>;

<em># 转为列表</em>
<i>List&lt;E&gt;</i> <b>toList</b>(
	{<i>bool</i> <u>growable</u> = true} 	<em>// 默认可改变长度 (growable:true)</em> 
)
List v = set.<q>toList</q>( );				<em>// {0: 0, 1: 1, 2: 2}</em>
List v = set.<q>toList</q>( growable:true );

<em># 用指定字符连接集合元素，转为字符串</em>
<i>String</i> <b>join</b>(
	[<i>String</i> separator = ''] 			<em>// 分隔符</em>
)
String v = list.<q>join</q>('-'); 